﻿// RankingSejmowy 1.0 - Polish parliment statistics for the masses.
// Copyright (C) 2010 Jarosław Dubrownik
//  
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//  
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//  
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
using System;
using System.Diagnostics;
using RankingSejmowy.Model.Import;
using RankingSejmowy.Model.Storage;

namespace RankingSejmowy.BLL.Import.Spider.Downloaders
{
    public class PageCache : IPageCache
    {
        private readonly IStorage _storage;

        public PageCache(IStorage storage)
        {
            _storage = storage;
        }

        #region IPageCache Members

        public bool IsPageInCache(Uri uri)
        {
            Debug.Assert(uri != null);
            var name = uri.GetHashCode().ToString();
            return _storage.IsInStorage(name);
        }

        public DownloadedPage GetPageFromCache(Uri uri)
        {
            Debug.Assert(uri != null);
            var name = uri.GetHashCode().ToString();
            Debug.Assert(_storage.IsInStorage(name));

            return new DownloadedPage(_storage.Retrive(name));
        }

        public void SavePageInCache(DownloadedPage page)
        {
            Debug.Assert(page != null);
        }

        #endregion
    }
}